USB Controller
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_USBTABLE
is an array of pointers located at
ROM_APITABLE[16]
.
ROM_USBEndpointDMAEnable
is a function pointer located at
ROM_USBTABLE[42]
.
Parameters:
ui32Base
specifies the USB module base address.
ui32Endpoint
is the endpoint to access.
ui32Flags
specifies which direction and what mode to use when enabling DMA.
Description:
This function will enable DMA on a given endpoint and set the mode according to the val-
ues in the
ui32Flags
parameter. The
ui32Flags
parameter should have
USB_EP_DEV_IN
or
USB_EP_DEV_OUT
set.
Returns:
None.
24.3.1.21 ROM_USBEndpointStatus
Returns the current status of an endpoint.
Prototype:
uint32_t
ROM_USBEndpointStatus(uint32_t ui32Base,
uint32_t ui32Endpoint)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_USBTABLE
is an array of pointers located at
ROM_APITABLE[16]
.
ROM_USBEndpointStatus
is a function pointer located at
ROM_USBTABLE[14]
.
Parameters:
ui32Base
specifies the USB module base address.
ui32Endpoint
is the endpoint to access.
Description:
This function will return the status of a given endpoint.
If any of these status
bits need to be cleared, then these these values must be cleared by calling the
ROM_USBDevEndpointStatusClear()
or
ROM_USBHostEndpointStatusClear()
functions.
The following are the status flags for host mode:
USB_HOST_IN_PID_ERROR
- PID error on the given endpoint.
USB_HOST_IN_NOT_COMP
- The device failed to respond to an IN request.
USB_HOST_IN_STALL
- A stall was received on an IN endpoint.
USB_HOST_IN_DATA_ERROR
- There was a CRC or bit-stuff error on an IN endpoint in
Isochronous mode.
USB_HOST_IN_NAK_TO
- NAKs received on this IN endpoint for more than the specified
timeout period.
USB_HOST_IN_ERROR
- Failed to communicate with a device using this IN endpoint.
USB_HOST_IN_FIFO_FULL
- This IN endpoint’s FIFO is full.
316
April 8, 2013
Содержание Tiva TM4C123GH6PM
Страница 26: ...Boot Loader 26 April 8 2013...
Страница 68: ...Controller Area Network CAN 68 April 8 2013...
Страница 122: ...Hibernation Module 122 April 8 2013...
Страница 136: ...Inter Integrated Circuit I2C 136 April 8 2013...
Страница 152: ...Memory Protection Unit MPU 152 April 8 2013...
Страница 174: ...Pulse Width Modulator PWM Returns None 174 April 8 2013...
Страница 196: ...Synchronous Serial Interface SSI 196 April 8 2013...
Страница 222: ...System Control 222 April 8 2013...
Страница 270: ...UART 270 April 8 2013...
Страница 296: ...uDMA Controller 296 April 8 2013...
Страница 351: ...April 8 2013 351...